<template>
	<div>
		<nav-bar>
			<div slot="left" class="backBtn" @click="backBtnClick">
				<img src="~assets/img/common/back.svg" alt="">
			</div>
			<div slot="center" class="title">
				<div v-for="(item, index) in titles" 
					 class="title-item"
					 :class="{active: index === currentIndex}"
					 @click="titleClick(index)">
					 {{item}}
				</div>
			</div>
		</nav-bar>
	</div>
</template>

<script>
	//导入导航栏组件 NavBar.vue
	import NavBar from 'components/common/navbar/NavBar.vue'
	
	export default {
		name: "DetailNavBar",
		components: {
			NavBar
		},
		data(){
			return {
				titles: ['商品','参数','评论','推荐'],
				currentIndex: 0
			}
		},
		methods: {
			titleClick(index){
				this.currentIndex = index
				//发射事件
				this.$emit('titleClick', index)
			},
			backBtnClick(){
				this.$router.back()
			}
		}
	}
</script>

<style scoped="scoped">
	.title {
		display: flex;
	}
	.title-item {
		flex: 1;
	}
	.active {
		color: var(--color-high-text);
	}
	.backBtn {
		margin-top: 7px;
	}
</style>
